package com.cjt.security;

import cn.hutool.json.JSONUtil;
import com.cjt.common.lang.R;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;


//AuthenticationEntryPoint: 用来解决匿名用户访问无权限资源时的异常
@Component
public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        ServletOutputStream servletOutputStream = response.getOutputStream();

        R r = R.fail("请先登录");
        servletOutputStream.write(JSONUtil.toJsonStr(r).getBytes(StandardCharsets.UTF_8));

        servletOutputStream.flush();
        servletOutputStream.close();
    }
}
